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CommitLineData
1da177e4
LT
1/*
2 * linux/arch/alpha/kernel/osf_sys.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 */
6
7/*
8 * This file handles some of the stranger OSF/1 system call interfaces.
9 * Some of the system calls expect a non-C calling standard, others have
10 * special parameter blocks..
11 */
12
13#include <linux/errno.h>
3f07c014 14#include <linux/sched/signal.h>
01042607 15#include <linux/sched/mm.h>
68db0cf1 16#include <linux/sched/task_stack.h>
32ef5517 17#include <linux/sched/cputime.h>
1da177e4
LT
18#include <linux/kernel.h>
19#include <linux/mm.h>
20#include <linux/smp.h>
1da177e4
LT
21#include <linux/stddef.h>
22#include <linux/syscalls.h>
23#include <linux/unistd.h>
24#include <linux/ptrace.h>
1da177e4 25#include <linux/user.h>
1da177e4
LT
26#include <linux/utsname.h>
27#include <linux/time.h>
28#include <linux/timex.h>
29#include <linux/major.h>
30#include <linux/stat.h>
31#include <linux/mman.h>
32#include <linux/shm.h>
33#include <linux/poll.h>
34#include <linux/file.h>
35#include <linux/types.h>
36#include <linux/ipc.h>
37#include <linux/namei.h>
38#include <linux/uio.h>
39#include <linux/vfs.h>
4fb3a538 40#include <linux/rcupdate.h>
5a0e3ad6 41#include <linux/slab.h>
1da177e4
LT
42
43#include <asm/fpu.h>
44#include <asm/io.h>
7c0f6ba6 45#include <linux/uaccess.h>
1da177e4 46#include <asm/sysinfo.h>
2df7a7d1 47#include <asm/thread_info.h>
1da177e4
LT
48#include <asm/hwrpb.h>
49#include <asm/processor.h>
50
1da177e4
LT
51/*
52 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
53 * which OSF programs just shouldn't be doing. We're still not quite
54 * identical to OSF as we don't return 0 on success, but doing otherwise
55 * would require changes to libc. Hopefully this is good enough.
56 */
e5d9a90c 57SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
1da177e4
LT
58{
59 unsigned long retval = sys_brk(brk);
60 if (brk && brk != retval)
61 retval = -ENOMEM;
62 return retval;
63}
64
65/*
66 * This is pure guess-work..
67 */
e5d9a90c
IK
68SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
69 unsigned long, text_len, unsigned long, bss_start,
70 unsigned long, bss_len)
1da177e4
LT
71{
72 struct mm_struct *mm;
73
1da177e4
LT
74 mm = current->mm;
75 mm->end_code = bss_start + bss_len;
2444e56b 76 mm->start_brk = bss_start + bss_len;
1da177e4
LT
77 mm->brk = bss_start + bss_len;
78#if 0
79 printk("set_program_attributes(%lx %lx %lx %lx)\n",
80 text_start, text_len, bss_start, bss_len);
81#endif
1da177e4
LT
82 return 0;
83}
84
85/*
86 * OSF/1 directory handling functions...
87 *
88 * The "getdents()" interface is much more sane: the "basep" stuff is
89 * braindamage (it can't really handle filesystems where the directory
90 * offset differences aren't the same as "d_reclen").
91 */
92#define NAME_OFFSET offsetof (struct osf_dirent, d_name)
1da177e4
LT
93
94struct osf_dirent {
95 unsigned int d_ino;
96 unsigned short d_reclen;
97 unsigned short d_namlen;
98 char d_name[1];
99};
100
101struct osf_dirent_callback {
5c0ba4e0 102 struct dir_context ctx;
1da177e4
LT
103 struct osf_dirent __user *dirent;
104 long __user *basep;
105 unsigned int count;
106 int error;
107};
108
109static int
ac7576f4
MS
110osf_filldir(struct dir_context *ctx, const char *name, int namlen,
111 loff_t offset, u64 ino, unsigned int d_type)
1da177e4
LT
112{
113 struct osf_dirent __user *dirent;
ac7576f4
MS
114 struct osf_dirent_callback *buf =
115 container_of(ctx, struct osf_dirent_callback, ctx);
180e53a7 116 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
afefdbb2 117 unsigned int d_ino;
1da177e4
LT
118
119 buf->error = -EINVAL; /* only used if we fail */
120 if (reclen > buf->count)
121 return -EINVAL;
afefdbb2 122 d_ino = ino;
645e68ed
AV
123 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
124 buf->error = -EOVERFLOW;
afefdbb2 125 return -EOVERFLOW;
645e68ed 126 }
1da177e4
LT
127 if (buf->basep) {
128 if (put_user(offset, buf->basep))
645e68ed 129 goto Efault;
1da177e4
LT
130 buf->basep = NULL;
131 }
132 dirent = buf->dirent;
645e68ed
AV
133 if (put_user(d_ino, &dirent->d_ino) ||
134 put_user(namlen, &dirent->d_namlen) ||
135 put_user(reclen, &dirent->d_reclen) ||
136 copy_to_user(dirent->d_name, name, namlen) ||
1da177e4 137 put_user(0, dirent->d_name + namlen))
645e68ed 138 goto Efault;
1da177e4
LT
139 dirent = (void __user *)dirent + reclen;
140 buf->dirent = dirent;
141 buf->count -= reclen;
142 return 0;
645e68ed
AV
143Efault:
144 buf->error = -EFAULT;
145 return -EFAULT;
1da177e4
LT
146}
147
e5d9a90c
IK
148SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
149 struct osf_dirent __user *, dirent, unsigned int, count,
150 long __user *, basep)
1da177e4
LT
151{
152 int error;
63b6df14 153 struct fd arg = fdget_pos(fd);
ac6614b7
AV
154 struct osf_dirent_callback buf = {
155 .ctx.actor = osf_filldir,
156 .dirent = dirent,
157 .basep = basep,
158 .count = count
159 };
1da177e4 160
2903ff01
AV
161 if (!arg.file)
162 return -EBADF;
1da177e4 163
5c0ba4e0 164 error = iterate_dir(arg.file, &buf.ctx);
53c9c5c0
AV
165 if (error >= 0)
166 error = buf.error;
1da177e4
LT
167 if (count != buf.count)
168 error = count - buf.count;
169
63b6df14 170 fdput_pos(arg);
1da177e4
LT
171 return error;
172}
173
1da177e4
LT
174#undef NAME_OFFSET
175
e5d9a90c
IK
176SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
177 unsigned long, prot, unsigned long, flags, unsigned long, fd,
178 unsigned long, off)
1da177e4 179{
f8b72560 180 unsigned long ret = -EINVAL;
1da177e4
LT
181
182#if 0
183 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
184 printk("%s: unimplemented OSF mmap flags %04lx\n",
185 current->comm, flags);
186#endif
f8b72560
AV
187 if ((off + PAGE_ALIGN(len)) < off)
188 goto out;
189 if (off & ~PAGE_MASK)
190 goto out;
191 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
1da177e4
LT
192 out:
193 return ret;
194}
195
7a8bb98c
MR
196struct osf_stat {
197 int st_dev;
198 int st_pad1;
199 unsigned st_mode;
200 unsigned short st_nlink;
201 short st_nlink_reserved;
202 unsigned st_uid;
203 unsigned st_gid;
204 int st_rdev;
205 int st_ldev;
206 long st_size;
207 int st_pad2;
208 int st_uatime;
209 int st_pad3;
210 int st_umtime;
211 int st_pad4;
212 int st_uctime;
213 int st_pad5;
214 int st_pad6;
215 unsigned st_flags;
216 unsigned st_gen;
217 long st_spare[4];
218 unsigned st_ino;
219 int st_ino_reserved;
220 int st_atime;
221 int st_atime_reserved;
222 int st_mtime;
223 int st_mtime_reserved;
224 int st_ctime;
225 int st_ctime_reserved;
226 long st_blksize;
227 long st_blocks;
228};
1da177e4
LT
229
230/*
231 * The OSF/1 statfs structure is much larger, but this should
232 * match the beginning, at least.
233 */
234struct osf_statfs {
235 short f_type;
236 short f_flags;
237 int f_fsize;
238 int f_bsize;
239 int f_blocks;
240 int f_bfree;
241 int f_bavail;
242 int f_files;
243 int f_ffree;
244 __kernel_fsid_t f_fsid;
245};
246
7a8bb98c
MR
247struct osf_statfs64 {
248 short f_type;
249 short f_flags;
250 int f_pad1;
251 int f_pad2;
252 int f_pad3;
253 int f_pad4;
254 int f_pad5;
255 int f_pad6;
256 int f_pad7;
257 __kernel_fsid_t f_fsid;
258 u_short f_namemax;
259 short f_reserved1;
260 int f_spare[8];
261 char f_pad8[90];
262 char f_pad9[90];
263 long mount_info[10];
264 u_long f_flags2;
265 long f_spare2[14];
266 long f_fsize;
267 long f_bsize;
268 long f_blocks;
269 long f_bfree;
270 long f_bavail;
271 long f_files;
272 long f_ffree;
273};
274
275static int
276linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
277{
278 struct osf_stat tmp = { 0 };
279
280 tmp.st_dev = lstat->dev;
281 tmp.st_mode = lstat->mode;
282 tmp.st_nlink = lstat->nlink;
f31389d5
EB
283 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
284 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
7a8bb98c
MR
285 tmp.st_rdev = lstat->rdev;
286 tmp.st_ldev = lstat->rdev;
287 tmp.st_size = lstat->size;
288 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
289 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
290 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
291 tmp.st_ino = lstat->ino;
292 tmp.st_atime = lstat->atime.tv_sec;
293 tmp.st_mtime = lstat->mtime.tv_sec;
294 tmp.st_ctime = lstat->ctime.tv_sec;
295 tmp.st_blksize = lstat->blksize;
296 tmp.st_blocks = lstat->blocks;
297
298 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
299}
300
1da177e4
LT
301static int
302linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
303 unsigned long bufsiz)
304{
305 struct osf_statfs tmp_stat;
306
307 tmp_stat.f_type = linux_stat->f_type;
308 tmp_stat.f_flags = 0; /* mount flags */
309 tmp_stat.f_fsize = linux_stat->f_frsize;
310 tmp_stat.f_bsize = linux_stat->f_bsize;
311 tmp_stat.f_blocks = linux_stat->f_blocks;
312 tmp_stat.f_bfree = linux_stat->f_bfree;
313 tmp_stat.f_bavail = linux_stat->f_bavail;
314 tmp_stat.f_files = linux_stat->f_files;
315 tmp_stat.f_ffree = linux_stat->f_ffree;
316 tmp_stat.f_fsid = linux_stat->f_fsid;
317 if (bufsiz > sizeof(tmp_stat))
318 bufsiz = sizeof(tmp_stat);
319 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
320}
321
7a8bb98c
MR
322static int
323linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
324 unsigned long bufsiz)
325{
326 struct osf_statfs64 tmp_stat = { 0 };
327
328 tmp_stat.f_type = linux_stat->f_type;
329 tmp_stat.f_fsize = linux_stat->f_frsize;
330 tmp_stat.f_bsize = linux_stat->f_bsize;
331 tmp_stat.f_blocks = linux_stat->f_blocks;
332 tmp_stat.f_bfree = linux_stat->f_bfree;
333 tmp_stat.f_bavail = linux_stat->f_bavail;
334 tmp_stat.f_files = linux_stat->f_files;
335 tmp_stat.f_ffree = linux_stat->f_ffree;
336 tmp_stat.f_fsid = linux_stat->f_fsid;
337 if (bufsiz > sizeof(tmp_stat))
338 bufsiz = sizeof(tmp_stat);
339 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
340}
341
c8b91acc
AV
342SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
343 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
1da177e4
LT
344{
345 struct kstatfs linux_stat;
c8b91acc 346 int error = user_statfs(pathname, &linux_stat);
1da177e4
LT
347 if (!error)
348 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
349 return error;
350}
351
7a8bb98c
MR
352SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
353{
354 struct kstat stat;
355 int error;
356
357 error = vfs_stat(name, &stat);
358 if (error)
359 return error;
360
361 return linux_to_osf_stat(&stat, buf);
362}
363
364SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
365{
366 struct kstat stat;
367 int error;
368
369 error = vfs_lstat(name, &stat);
370 if (error)
371 return error;
372
373 return linux_to_osf_stat(&stat, buf);
374}
375
376SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
377{
378 struct kstat stat;
379 int error;
380
381 error = vfs_fstat(fd, &stat);
382 if (error)
383 return error;
384
385 return linux_to_osf_stat(&stat, buf);
386}
387
e5d9a90c
IK
388SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
389 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
1da177e4 390{
c8b91acc
AV
391 struct kstatfs linux_stat;
392 int error = fd_statfs(fd, &linux_stat);
393 if (!error)
394 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
395 return error;
1da177e4
LT
396}
397
7a8bb98c
MR
398SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
399 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
400{
401 struct kstatfs linux_stat;
402 int error = user_statfs(pathname, &linux_stat);
403 if (!error)
404 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
405 return error;
406}
407
408SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
409 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
410{
411 struct kstatfs linux_stat;
412 int error = fd_statfs(fd, &linux_stat);
413 if (!error)
414 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
415 return error;
416}
417
1da177e4
LT
418/*
419 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
420 *
421 * Although to be frank, neither are the native Linux/i386 ones..
422 */
423struct ufs_args {
424 char __user *devname;
425 int flags;
426 uid_t exroot;
427};
428
429struct cdfs_args {
430 char __user *devname;
431 int flags;
432 uid_t exroot;
433
434 /* This has lots more here, which Linux handles with the option block
435 but I'm too lazy to do the translation into ASCII. */
436};
437
438struct procfs_args {
439 char __user *devname;
440 int flags;
441 uid_t exroot;
442};
443
444/*
445 * We can't actually handle ufs yet, so we translate UFS mounts to
446 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
447 * layout is so braindead it's a major headache doing it.
448 *
449 * Just how long ago was it written? OTOH our UFS driver may be still
450 * unhappy with OSF UFS. [CHECKME]
451 */
452static int
5e6123f3
SL
453osf_ufs_mount(const char __user *dirname,
454 struct ufs_args __user *args, int flags)
1da177e4
LT
455{
456 int retval;
457 struct cdfs_args tmp;
91a27b2a 458 struct filename *devname;
1da177e4
LT
459
460 retval = -EFAULT;
461 if (copy_from_user(&tmp, args, sizeof(tmp)))
462 goto out;
463 devname = getname(tmp.devname);
464 retval = PTR_ERR(devname);
465 if (IS_ERR(devname))
466 goto out;
91a27b2a 467 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
1da177e4
LT
468 putname(devname);
469 out:
470 return retval;
471}
472
473static int
5e6123f3
SL
474osf_cdfs_mount(const char __user *dirname,
475 struct cdfs_args __user *args, int flags)
1da177e4
LT
476{
477 int retval;
478 struct cdfs_args tmp;
91a27b2a 479 struct filename *devname;
1da177e4
LT
480
481 retval = -EFAULT;
482 if (copy_from_user(&tmp, args, sizeof(tmp)))
483 goto out;
484 devname = getname(tmp.devname);
485 retval = PTR_ERR(devname);
486 if (IS_ERR(devname))
487 goto out;
91a27b2a 488 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
1da177e4
LT
489 putname(devname);
490 out:
491 return retval;
492}
493
494static int
5e6123f3
SL
495osf_procfs_mount(const char __user *dirname,
496 struct procfs_args __user *args, int flags)
1da177e4
LT
497{
498 struct procfs_args tmp;
499
500 if (copy_from_user(&tmp, args, sizeof(tmp)))
501 return -EFAULT;
502
503 return do_mount("", dirname, "proc", flags, NULL);
504}
505
c7887325 506SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
e5d9a90c 507 int, flag, void __user *, data)
1da177e4 508{
77079dbe 509 int retval;
1da177e4 510
1da177e4
LT
511 switch (typenr) {
512 case 1:
5e6123f3 513 retval = osf_ufs_mount(path, data, flag);
1da177e4
LT
514 break;
515 case 6:
5e6123f3 516 retval = osf_cdfs_mount(path, data, flag);
1da177e4
LT
517 break;
518 case 9:
5e6123f3 519 retval = osf_procfs_mount(path, data, flag);
1da177e4
LT
520 break;
521 default:
77079dbe 522 retval = -EINVAL;
1da177e4
LT
523 printk("osf_mount(%ld, %x)\n", typenr, flag);
524 }
5e6123f3 525
1da177e4
LT
526 return retval;
527}
528
e5d9a90c 529SYSCALL_DEFINE1(osf_utsname, char __user *, name)
1da177e4
LT
530{
531 int error;
532
533 down_read(&uts_sem);
534 error = -EFAULT;
e9ff3990 535 if (copy_to_user(name + 0, utsname()->sysname, 32))
1da177e4 536 goto out;
e9ff3990 537 if (copy_to_user(name + 32, utsname()->nodename, 32))
1da177e4 538 goto out;
e9ff3990 539 if (copy_to_user(name + 64, utsname()->release, 32))
1da177e4 540 goto out;
e9ff3990 541 if (copy_to_user(name + 96, utsname()->version, 32))
1da177e4 542 goto out;
e9ff3990 543 if (copy_to_user(name + 128, utsname()->machine, 32))
1da177e4
LT
544 goto out;
545
546 error = 0;
547 out:
548 up_read(&uts_sem);
549 return error;
550}
551
e5d9a90c 552SYSCALL_DEFINE0(getpagesize)
1da177e4
LT
553{
554 return PAGE_SIZE;
555}
556
e5d9a90c 557SYSCALL_DEFINE0(getdtablesize)
1da177e4 558{
9cfe015a 559 return sysctl_nr_open;
1da177e4
LT
560}
561
562/*
563 * For compatibility with OSF/1 only. Use utsname(2) instead.
564 */
e5d9a90c 565SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
1da177e4 566{
9ba3eb51
AV
567 int len, err = 0;
568 char *kname;
1da177e4 569
9ba3eb51
AV
570 if (namelen > 32)
571 namelen = 32;
1da177e4
LT
572
573 down_read(&uts_sem);
9ba3eb51
AV
574 kname = utsname()->domainname;
575 len = strnlen(kname, namelen);
576 if (copy_to_user(name, kname, min(len + 1, namelen)))
577 err = -EFAULT;
1da177e4
LT
578 up_read(&uts_sem);
579
9ba3eb51 580 return err;
1da177e4
LT
581}
582
1da177e4
LT
583/*
584 * The following stuff should move into a header file should it ever
585 * be labeled "officially supported." Right now, there is just enough
586 * support to avoid applications (such as tar) printing error
587 * messages. The attributes are not really implemented.
588 */
589
590/*
591 * Values for Property list entry flag
592 */
593#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
594 by default */
595#define PLE_FLAG_MASK 0x1 /* Valid flag values */
596#define PLE_FLAG_ALL -1 /* All flag value */
597
598struct proplistname_args {
599 unsigned int pl_mask;
600 unsigned int pl_numnames;
601 char **pl_names;
602};
603
604union pl_args {
605 struct setargs {
606 char __user *path;
607 long follow;
608 long nbytes;
609 char __user *buf;
610 } set;
611 struct fsetargs {
612 long fd;
613 long nbytes;
614 char __user *buf;
615 } fset;
616 struct getargs {
617 char __user *path;
618 long follow;
619 struct proplistname_args __user *name_args;
620 long nbytes;
621 char __user *buf;
622 int __user *min_buf_size;
623 } get;
624 struct fgetargs {
625 long fd;
626 struct proplistname_args __user *name_args;
627 long nbytes;
628 char __user *buf;
629 int __user *min_buf_size;
630 } fget;
631 struct delargs {
632 char __user *path;
633 long follow;
634 struct proplistname_args __user *name_args;
635 } del;
636 struct fdelargs {
637 long fd;
638 struct proplistname_args __user *name_args;
639 } fdel;
640};
641
642enum pl_code {
643 PL_SET = 1, PL_FSET = 2,
644 PL_GET = 3, PL_FGET = 4,
645 PL_DEL = 5, PL_FDEL = 6
646};
647
e5d9a90c
IK
648SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
649 union pl_args __user *, args)
1da177e4
LT
650{
651 long error;
652 int __user *min_buf_size_ptr;
653
1da177e4
LT
654 switch (code) {
655 case PL_SET:
656 if (get_user(error, &args->set.nbytes))
657 error = -EFAULT;
658 break;
659 case PL_FSET:
660 if (get_user(error, &args->fset.nbytes))
661 error = -EFAULT;
662 break;
663 case PL_GET:
664 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
665 if (error)
666 break;
667 error = put_user(0, min_buf_size_ptr);
668 break;
669 case PL_FGET:
670 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
671 if (error)
672 break;
673 error = put_user(0, min_buf_size_ptr);
674 break;
675 case PL_DEL:
676 case PL_FDEL:
677 error = 0;
678 break;
679 default:
680 error = -EOPNOTSUPP;
681 break;
682 };
1da177e4
LT
683 return error;
684}
685
e5d9a90c
IK
686SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
687 struct sigstack __user *, uoss)
1da177e4
LT
688{
689 unsigned long usp = rdusp();
690 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
691 unsigned long oss_os = on_sig_stack(usp);
692 int error;
693
694 if (uss) {
695 void __user *ss_sp;
696
697 error = -EFAULT;
698 if (get_user(ss_sp, &uss->ss_sp))
699 goto out;
700
701 /* If the current stack was set with sigaltstack, don't
702 swap stacks while we are on it. */
703 error = -EPERM;
704 if (current->sas_ss_sp && on_sig_stack(usp))
705 goto out;
706
707 /* Since we don't know the extent of the stack, and we don't
708 track onstack-ness, but rather calculate it, we must
709 presume a size. Ho hum this interface is lossy. */
710 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
711 current->sas_ss_size = SIGSTKSZ;
712 }
713
714 if (uoss) {
715 error = -EFAULT;
716 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
717 || __put_user(oss_sp, &uoss->ss_sp)
718 || __put_user(oss_os, &uoss->ss_onstack))
719 goto out;
720 }
721
722 error = 0;
723 out:
724 return error;
725}
726
e5d9a90c 727SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
1da177e4 728{
31019075 729 const char *sysinfo_table[] = {
e9ff3990
SH
730 utsname()->sysname,
731 utsname()->nodename,
732 utsname()->release,
733 utsname()->version,
734 utsname()->machine,
1da177e4
LT
735 "alpha", /* instruction set architecture */
736 "dummy", /* hardware serial number */
737 "dummy", /* hardware manufacturer */
738 "dummy", /* secure RPC domain */
739 };
740 unsigned long offset;
31019075 741 const char *res;
1da177e4
LT
742 long len, err = -EINVAL;
743
744 offset = command-1;
25c8716c 745 if (offset >= ARRAY_SIZE(sysinfo_table)) {
1da177e4
LT
746 /* Digital UNIX has a few unpublished interfaces here */
747 printk("sysinfo(%d)", command);
748 goto out;
749 }
25c8716c 750
1da177e4
LT
751 down_read(&uts_sem);
752 res = sysinfo_table[offset];
753 len = strlen(res)+1;
21c5977a 754 if ((unsigned long)len > (unsigned long)count)
1da177e4
LT
755 len = count;
756 if (copy_to_user(buf, res, len))
757 err = -EFAULT;
758 else
759 err = 0;
760 up_read(&uts_sem);
761 out:
762 return err;
763}
764
e5d9a90c
IK
765SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
766 unsigned long, nbytes, int __user *, start, void __user *, arg)
1da177e4
LT
767{
768 unsigned long w;
769 struct percpu_struct *cpu;
770
771 switch (op) {
772 case GSI_IEEE_FP_CONTROL:
773 /* Return current software fp control & status bits. */
774 /* Note that DU doesn't verify available space here. */
775
776 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
777 w = swcr_update_status(w, rdfpcr());
778 if (put_user(w, (unsigned long __user *) buffer))
779 return -EFAULT;
780 return 0;
781
782 case GSI_IEEE_STATE_AT_SIGNAL:
783 /*
784 * Not sure anybody will ever use this weird stuff. These
785 * ops can be used (under OSF/1) to set the fpcr that should
786 * be used when a signal handler starts executing.
787 */
788 break;
789
790 case GSI_UACPROC:
791 if (nbytes < sizeof(unsigned int))
792 return -EINVAL;
3185bd26 793 w = current_thread_info()->status & UAC_BITMASK;
2df7a7d1
ST
794 if (put_user(w, (unsigned int __user *)buffer))
795 return -EFAULT;
1da177e4
LT
796 return 1;
797
798 case GSI_PROC_TYPE:
799 if (nbytes < sizeof(unsigned long))
800 return -EINVAL;
801 cpu = (struct percpu_struct*)
802 ((char*)hwrpb + hwrpb->processor_offset);
803 w = cpu->type;
804 if (put_user(w, (unsigned long __user*)buffer))
805 return -EFAULT;
806 return 1;
807
808 case GSI_GET_HWRPB:
21c5977a 809 if (nbytes > sizeof(*hwrpb))
1da177e4
LT
810 return -EINVAL;
811 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
812 return -EFAULT;
813 return 1;
814
815 default:
816 break;
817 }
818
819 return -EOPNOTSUPP;
820}
821
e5d9a90c
IK
822SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
823 unsigned long, nbytes, int __user *, start, void __user *, arg)
1da177e4
LT
824{
825 switch (op) {
826 case SSI_IEEE_FP_CONTROL: {
827 unsigned long swcr, fpcr;
828 unsigned int *state;
829
830 /*
831 * Alpha Architecture Handbook 4.7.7.3:
832 * To be fully IEEE compiant, we must track the current IEEE
c3a2ddee 833 * exception state in software, because spurious bits can be
1da177e4
LT
834 * set in the trap shadow of a software-complete insn.
835 */
836
837 if (get_user(swcr, (unsigned long __user *)buffer))
838 return -EFAULT;
839 state = &current_thread_info()->ieee_state;
840
841 /* Update softare trap enable bits. */
842 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
843
844 /* Update the real fpcr. */
845 fpcr = rdfpcr() & FPCR_DYN_MASK;
846 fpcr |= ieee_swcr_to_fpcr(swcr);
847 wrfpcr(fpcr);
848
849 return 0;
850 }
851
852 case SSI_IEEE_RAISE_EXCEPTION: {
853 unsigned long exc, swcr, fpcr, fex;
854 unsigned int *state;
855
856 if (get_user(exc, (unsigned long __user *)buffer))
857 return -EFAULT;
858 state = &current_thread_info()->ieee_state;
859 exc &= IEEE_STATUS_MASK;
860
861 /* Update softare trap enable bits. */
862 swcr = (*state & IEEE_SW_MASK) | exc;
863 *state |= exc;
864
865 /* Update the real fpcr. */
866 fpcr = rdfpcr();
867 fpcr |= ieee_swcr_to_fpcr(swcr);
868 wrfpcr(fpcr);
869
870 /* If any exceptions set by this call, and are unmasked,
871 send a signal. Old exceptions are not signaled. */
872 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
873 if (fex) {
874 siginfo_t info;
875 int si_code = 0;
876
877 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
878 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
879 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
880 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
881 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
882 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
883
884 info.si_signo = SIGFPE;
885 info.si_errno = 0;
886 info.si_code = si_code;
887 info.si_addr = NULL; /* FIXME */
888 send_sig_info(SIGFPE, &info, current);
889 }
890 return 0;
891 }
892
893 case SSI_IEEE_STATE_AT_SIGNAL:
894 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
895 /*
896 * Not sure anybody will ever use this weird stuff. These
897 * ops can be used (under OSF/1) to set the fpcr that should
898 * be used when a signal handler starts executing.
899 */
900 break;
901
902 case SSI_NVPAIRS: {
3185bd26
AV
903 unsigned __user *p = buffer;
904 unsigned i;
1da177e4 905
3185bd26
AV
906 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
907 unsigned v, w, status;
1da177e4 908
3185bd26 909 if (get_user(v, p) || get_user(w, p + 1))
1da177e4
LT
910 return -EFAULT;
911 switch (v) {
912 case SSIN_UACPROC:
3185bd26
AV
913 w &= UAC_BITMASK;
914 status = current_thread_info()->status;
915 status = (status & ~UAC_BITMASK) | w;
916 current_thread_info()->status = status;
1da177e4
LT
917 break;
918
919 default:
920 return -EOPNOTSUPP;
921 }
922 }
923 return 0;
924 }
925
50744dee
MR
926 case SSI_LMF:
927 return 0;
928
1da177e4
LT
929 default:
930 break;
931 }
932
933 return -EOPNOTSUPP;
934}
935
936/* Translations due to the fact that OSF's time_t is an int. Which
937 affects all sorts of things, like timeval and itimerval. */
938
939extern struct timezone sys_tz;
1da177e4
LT
940
941struct timeval32
942{
943 int tv_sec, tv_usec;
944};
945
946struct itimerval32
947{
948 struct timeval32 it_interval;
949 struct timeval32 it_value;
950};
951
952static inline long
953get_tv32(struct timeval *o, struct timeval32 __user *i)
954{
955 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
956 (__get_user(o->tv_sec, &i->tv_sec) |
957 __get_user(o->tv_usec, &i->tv_usec)));
958}
959
960static inline long
961put_tv32(struct timeval32 __user *o, struct timeval *i)
962{
963 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
964 (__put_user(i->tv_sec, &o->tv_sec) |
965 __put_user(i->tv_usec, &o->tv_usec)));
966}
967
968static inline long
969get_it32(struct itimerval *o, struct itimerval32 __user *i)
970{
971 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
972 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
973 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
974 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
975 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
976}
977
978static inline long
979put_it32(struct itimerval32 __user *o, struct itimerval *i)
980{
981 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
982 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
983 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
984 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
985 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
986}
987
988static inline void
989jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
990{
991 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
992 value->tv_sec = jiffies / HZ;
993}
994
e5d9a90c
IK
995SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
996 struct timezone __user *, tz)
1da177e4
LT
997{
998 if (tv) {
999 struct timeval ktv;
1000 do_gettimeofday(&ktv);
1001 if (put_tv32(tv, &ktv))
1002 return -EFAULT;
1003 }
1004 if (tz) {
1005 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1006 return -EFAULT;
1007 }
1008 return 0;
1009}
1010
e5d9a90c
IK
1011SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1012 struct timezone __user *, tz)
1da177e4 1013{
2ac00f17 1014 struct timespec64 kts64;
1da177e4
LT
1015 struct timespec kts;
1016 struct timezone ktz;
1017
1018 if (tv) {
1019 if (get_tv32((struct timeval *)&kts, tv))
1020 return -EFAULT;
cceaeddc 1021 kts.tv_nsec *= 1000;
2ac00f17 1022 kts64 = timespec_to_timespec64(kts);
1da177e4
LT
1023 }
1024 if (tz) {
1025 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1026 return -EFAULT;
1027 }
1028
2ac00f17 1029 return do_sys_settimeofday64(tv ? &kts64 : NULL, tz ? &ktz : NULL);
1da177e4
LT
1030}
1031
baa73d9e
NP
1032asmlinkage long sys_ni_posix_timers(void);
1033
e5d9a90c 1034SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1da177e4
LT
1035{
1036 struct itimerval kit;
1037 int error;
1038
baa73d9e
NP
1039 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1040 return sys_ni_posix_timers();
1041
1da177e4
LT
1042 error = do_getitimer(which, &kit);
1043 if (!error && put_it32(it, &kit))
1044 error = -EFAULT;
1045
1046 return error;
1047}
1048
e5d9a90c
IK
1049SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1050 struct itimerval32 __user *, out)
1da177e4
LT
1051{
1052 struct itimerval kin, kout;
1053 int error;
1054
baa73d9e
NP
1055 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1056 return sys_ni_posix_timers();
1057
1da177e4
LT
1058 if (in) {
1059 if (get_it32(&kin, in))
1060 return -EFAULT;
1061 } else
1062 memset(&kin, 0, sizeof(kin));
1063
1064 error = do_setitimer(which, &kin, out ? &kout : NULL);
1065 if (error || !out)
1066 return error;
1067
1068 if (put_it32(out, &kout))
1069 return -EFAULT;
1070
1071 return 0;
1072
1073}
1074
c7887325 1075SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
e5d9a90c 1076 struct timeval32 __user *, tvs)
1da177e4 1077{
1c710c89 1078 struct timespec tv[2];
1da177e4
LT
1079
1080 if (tvs) {
1c710c89 1081 struct timeval ktvs[2];
1da177e4
LT
1082 if (get_tv32(&ktvs[0], &tvs[0]) ||
1083 get_tv32(&ktvs[1], &tvs[1]))
1084 return -EFAULT;
1c710c89
UD
1085
1086 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1087 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1088 return -EINVAL;
1089
1090 tv[0].tv_sec = ktvs[0].tv_sec;
1091 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1092 tv[1].tv_sec = ktvs[1].tv_sec;
1093 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1da177e4
LT
1094 }
1095
1c710c89 1096 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1da177e4
LT
1097}
1098
e5d9a90c
IK
1099SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1100 fd_set __user *, exp, struct timeval32 __user *, tvp)
1da177e4 1101{
14e2acd8 1102 struct timespec end_time, *to = NULL;
1da177e4
LT
1103 if (tvp) {
1104 time_t sec, usec;
1105
14e2acd8
AV
1106 to = &end_time;
1107
1da177e4
LT
1108 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1109 || __get_user(sec, &tvp->tv_sec)
1110 || __get_user(usec, &tvp->tv_usec)) {
a2dcb44c 1111 return -EFAULT;
1da177e4
LT
1112 }
1113
1114 if (sec < 0 || usec < 0)
a2dcb44c 1115 return -EINVAL;
1da177e4 1116
14e2acd8
AV
1117 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1118 return -EINVAL;
1119
1da177e4
LT
1120 }
1121
1da177e4 1122 /* OSF does not copy back the remaining time. */
14e2acd8 1123 return core_sys_select(n, inp, outp, exp, to);
1da177e4
LT
1124}
1125
1126struct rusage32 {
1127 struct timeval32 ru_utime; /* user time used */
1128 struct timeval32 ru_stime; /* system time used */
1129 long ru_maxrss; /* maximum resident set size */
1130 long ru_ixrss; /* integral shared memory size */
1131 long ru_idrss; /* integral unshared data size */
1132 long ru_isrss; /* integral unshared stack size */
1133 long ru_minflt; /* page reclaims */
1134 long ru_majflt; /* page faults */
1135 long ru_nswap; /* swaps */
1136 long ru_inblock; /* block input operations */
1137 long ru_oublock; /* block output operations */
1138 long ru_msgsnd; /* messages sent */
1139 long ru_msgrcv; /* messages received */
1140 long ru_nsignals; /* signals received */
1141 long ru_nvcsw; /* voluntary context switches */
1142 long ru_nivcsw; /* involuntary " */
1143};
1144
e5d9a90c 1145SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1da177e4
LT
1146{
1147 struct rusage32 r;
dc9b77b5 1148 u64 utime, stime;
2019e8a3 1149 unsigned long utime_jiffies, stime_jiffies;
1da177e4
LT
1150
1151 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1152 return -EINVAL;
1153
1154 memset(&r, 0, sizeof(r));
1155 switch (who) {
1156 case RUSAGE_SELF:
dc9b77b5
FW
1157 task_cputime(current, &utime, &stime);
1158 utime_jiffies = nsecs_to_jiffies(utime);
1159 stime_jiffies = nsecs_to_jiffies(stime);
2019e8a3
FW
1160 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1161 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1da177e4
LT
1162 r.ru_minflt = current->min_flt;
1163 r.ru_majflt = current->maj_flt;
1164 break;
1165 case RUSAGE_CHILDREN:
5613fda9
FW
1166 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1167 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
2019e8a3
FW
1168 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1169 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1da177e4
LT
1170 r.ru_minflt = current->signal->cmin_flt;
1171 r.ru_majflt = current->signal->cmaj_flt;
1172 break;
1173 }
1174
1175 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1176}
1177
e5d9a90c
IK
1178SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1179 struct rusage32 __user *, ur)
1da177e4
LT
1180{
1181 struct rusage r;
1182 long ret, err;
21c5977a 1183 unsigned int status = 0;
1da177e4
LT
1184 mm_segment_t old_fs;
1185
1186 if (!ur)
1187 return sys_wait4(pid, ustatus, options, NULL);
1188
1189 old_fs = get_fs();
1190
1191 set_fs (KERNEL_DS);
21c5977a
DR
1192 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1193 (struct rusage __user *) &r);
1da177e4
LT
1194 set_fs (old_fs);
1195
1196 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1197 return -EFAULT;
1198
1199 err = 0;
21c5977a 1200 err |= put_user(status, ustatus);
1da177e4
LT
1201 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1202 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1203 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1204 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1205 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1206 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1207 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1208 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1209 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1210 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1211 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1212 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1213 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1214 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1215 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1216 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1217 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1218 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1219
1220 return err ? err : ret;
1221}
1222
1223/*
1224 * I don't know what the parameters are: the first one
1225 * seems to be a timeval pointer, and I suspect the second
1226 * one is the time remaining.. Ho humm.. No documentation.
1227 */
e5d9a90c
IK
1228SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1229 struct timeval32 __user *, remain)
1da177e4
LT
1230{
1231 struct timeval tmp;
1232 unsigned long ticks;
1233
1234 if (get_tv32(&tmp, sleep))
1235 goto fault;
1236
24d568ed 1237 ticks = timeval_to_jiffies(&tmp);
1da177e4 1238
20c6abd1 1239 ticks = schedule_timeout_interruptible(ticks);
1da177e4
LT
1240
1241 if (remain) {
24d568ed 1242 jiffies_to_timeval(ticks, &tmp);
1da177e4
LT
1243 if (put_tv32(remain, &tmp))
1244 goto fault;
1245 }
1246
1247 return 0;
1248 fault:
1249 return -EFAULT;
1250}
1251
1252
1253struct timex32 {
1254 unsigned int modes; /* mode selector */
1255 long offset; /* time offset (usec) */
1256 long freq; /* frequency offset (scaled ppm) */
1257 long maxerror; /* maximum error (usec) */
1258 long esterror; /* estimated error (usec) */
1259 int status; /* clock command/status */
1260 long constant; /* pll time constant */
1261 long precision; /* clock precision (usec) (read only) */
1262 long tolerance; /* clock frequency tolerance (ppm)
1263 * (read only)
1264 */
1265 struct timeval32 time; /* (read only) */
1266 long tick; /* (modified) usecs between clock ticks */
1267
1268 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1269 long jitter; /* pps jitter (us) (ro) */
1270 int shift; /* interval duration (s) (shift) (ro) */
1271 long stabil; /* pps stability (scaled ppm) (ro) */
1272 long jitcnt; /* jitter limit exceeded (ro) */
1273 long calcnt; /* calibration intervals (ro) */
1274 long errcnt; /* calibration errors (ro) */
1275 long stbcnt; /* stability limit exceeded (ro) */
1276
1277 int :32; int :32; int :32; int :32;
1278 int :32; int :32; int :32; int :32;
1279 int :32; int :32; int :32; int :32;
1280};
1281
e5d9a90c 1282SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1da177e4
LT
1283{
1284 struct timex txc;
1285 int ret;
1286
1287 /* copy relevant bits of struct timex. */
1288 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1289 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
2b5efc08 1290 offsetof(struct timex32, tick)))
1da177e4
LT
1291 return -EFAULT;
1292
1293 ret = do_adjtimex(&txc);
1294 if (ret < 0)
1295 return ret;
1296
1297 /* copy back to timex32 */
1298 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1299 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1300 offsetof(struct timex32, tick))) ||
1301 (put_tv32(&txc_p->time, &txc.time)))
1302 return -EFAULT;
1303
1304 return ret;
1305}
1306
1307/* Get an address range which is currently unmapped. Similar to the
1308 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1309
1310static unsigned long
1311arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1312 unsigned long limit)
1313{
6d1c7cca
ML
1314 struct vm_unmapped_area_info info;
1315
1316 info.flags = 0;
1317 info.length = len;
1318 info.low_limit = addr;
1319 info.high_limit = limit;
1320 info.align_mask = 0;
1321 info.align_offset = 0;
1322 return vm_unmapped_area(&info);
1da177e4
LT
1323}
1324
1325unsigned long
1326arch_get_unmapped_area(struct file *filp, unsigned long addr,
1327 unsigned long len, unsigned long pgoff,
1328 unsigned long flags)
1329{
1330 unsigned long limit;
1331
1332 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1333 if (current->personality & ADDR_LIMIT_32BIT)
1334 limit = 0x80000000;
1335 else
1336 limit = TASK_SIZE;
1337
1338 if (len > limit)
1339 return -ENOMEM;
1340
4b87b3b2
BH
1341 if (flags & MAP_FIXED)
1342 return addr;
1343
1da177e4
LT
1344 /* First, see if the given suggestion fits.
1345
1346 The OSF/1 loader (/sbin/loader) relies on us returning an
1347 address larger than the requested if one exists, which is
1348 a terribly broken way to program.
1349
1350 That said, I can see the use in being able to suggest not
1351 merely specific addresses, but regions of memory -- perhaps
1352 this feature should be incorporated into all ports? */
1353
1354 if (addr) {
1355 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1356 if (addr != (unsigned long) -ENOMEM)
1357 return addr;
1358 }
1359
1360 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1361 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1362 len, limit);
1363 if (addr != (unsigned long) -ENOMEM)
1364 return addr;
1365
1366 /* Finally, try allocating in low memory. */
1367 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1368
1369 return addr;
1370}
1371
1372#ifdef CONFIG_OSF4_COMPAT
1373
1374/* Clear top 32 bits of iov_len in the user's buffer for
1375 compatibility with old versions of OSF/1 where iov_len
1376 was defined as int. */
1377static int
1378osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1379{
1380 unsigned long i;
1381
1382 for (i = 0 ; i < count ; i++) {
1383 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1384
1385 if (put_user(0, iov_len_high))
1386 return -EFAULT;
1387 }
1388 return 0;
1389}
1390
e5d9a90c
IK
1391SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1392 const struct iovec __user *, vector, unsigned long, count)
1da177e4
LT
1393{
1394 if (unlikely(personality(current->personality) == PER_OSF4))
1395 if (osf_fix_iov_len(vector, count))
1396 return -EFAULT;
1397 return sys_readv(fd, vector, count);
1398}
1399
e5d9a90c
IK
1400SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1401 const struct iovec __user *, vector, unsigned long, count)
1da177e4
LT
1402{
1403 if (unlikely(personality(current->personality) == PER_OSF4))
1404 if (osf_fix_iov_len(vector, count))
1405 return -EFAULT;
1406 return sys_writev(fd, vector, count);
1407}
1408
1409#endif
be53db6e
AV
1410
1411SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1412{
1413 int prio = sys_getpriority(which, who);
1414 if (prio >= 0) {
1415 /* Return value is the unbiased priority, i.e. 20 - prio.
1416 This does result in negative return values, so signal
1417 no error */
1418 force_successful_syscall_return();
1419 prio = 20 - prio;
1420 }
1421 return prio;
1422}
1423
1424SYSCALL_DEFINE0(getxuid)
1425{
1426 current_pt_regs()->r20 = sys_geteuid();
1427 return sys_getuid();
1428}
1429
1430SYSCALL_DEFINE0(getxgid)
1431{
1432 current_pt_regs()->r20 = sys_getegid();
1433 return sys_getgid();
1434}
1435
1436SYSCALL_DEFINE0(getxpid)
1437{
1438 current_pt_regs()->r20 = sys_getppid();
1439 return sys_getpid();
1440}
1441
1442SYSCALL_DEFINE0(alpha_pipe)
1443{
1444 int fd[2];
1445 int res = do_pipe_flags(fd, 0);
1446 if (!res) {
1447 /* The return values are in $0 and $20. */
1448 current_pt_regs()->r20 = fd[1];
1449 res = fd[0];
1450 }
1451 return res;
1452}
1453
1454SYSCALL_DEFINE1(sethae, unsigned long, val)
1455{
1456 current_pt_regs()->hae = val;
1457 return 0;
1458}